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Intangible Assets and Goodwill - Schedule of Changes in Carrying Amount of Goodwill for Each Reportable Segment (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Goodwill [Line Items]
Goodwill, balance	$ 573.8
Acquired goodwill	205.8
Foreign currency translation	1.8
Goodwill, balance	781.4
Connections [Member]
Goodwill [Line Items]
Goodwill, balance	538.2
Acquired goodwill	205.8
Foreign currency translation	1.8
Goodwill, balance	745.8
All Other [Member]
Goodwill [Line Items]
Goodwill, balance	35.6
Goodwill, balance	$ 35.6

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